EP2985064B1 - Équipement de filtration à système ouvert pour station de traitement des eaux - Google Patents

Équipement de filtration à système ouvert pour station de traitement des eaux Download PDF

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Publication number
EP2985064B1
EP2985064B1 EP14783501.1A EP14783501A EP2985064B1 EP 2985064 B1 EP2985064 B1 EP 2985064B1 EP 14783501 A EP14783501 A EP 14783501A EP 2985064 B1 EP2985064 B1 EP 2985064B1
Authority
EP
European Patent Office
Prior art keywords
filtering
filter
frame
open
frames
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Application number
EP14783501.1A
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German (de)
English (en)
Other versions
EP2985064A1 (fr
EP2985064A4 (fr
Inventor
Domingo CAMPILLO JARA
Marcos MARTIN GONZALEZ
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Empresa Municipal De Aguas Y Saneamientos De Murcia SA
Original Assignee
Empresa Municipal De Aguas Y Saneamientos De Murcia SA
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Publication date
Application filed by Empresa Municipal De Aguas Y Saneamientos De Murcia SA filed Critical Empresa Municipal De Aguas Y Saneamientos De Murcia SA
Publication of EP2985064A1 publication Critical patent/EP2985064A1/fr
Publication of EP2985064A4 publication Critical patent/EP2985064A4/fr
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D24/00—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
    • B01D24/02—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed stationary during the filtration
    • B01D24/20—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed stationary during the filtration the filtering material being provided in an open container
    • B01D24/22—Downward filtration, the filter material being supported by pervious surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D24/00—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
    • B01D24/02—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed stationary during the filtration
    • B01D24/20—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed stationary during the filtration the filtering material being provided in an open container
    • B01D24/24—Downward filtration, the container having distribution or collection headers or pervious conduits
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D24/00—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
    • B01D24/46—Regenerating the filtering material in the filter
    • B01D24/4631—Counter-current flushing, e.g. by air

Definitions

  • the present invention relates to the field of water treatment stations, and more particularly, to an open filtering system with filter bed, such as sand, coal, etc., for its use in open filtering applications.
  • filter bed such as sand, coal, etc.
  • the filtering systems commonly used in water treatment stations consist of concrete slabs provided with uniformly distributed holes. Filter elements are introduced in the interior of said holes, namely nozzles, which are provided with grids to filter the water entering there through and thus achieve the separation of the water from the filter bed.
  • US6615469 B1 shows an apparatus for retrofitting a water filtration underdrain which comprises a nozzle for uniform water distribution and blocks for raising the underdrain.
  • the present invention discloses open filtering equipment for application in a common water treatment station, said filtering system comprising:
  • the filtering equipment according to the present invention provides a double bottom in the open filter.
  • the upper surface provided by the filtering equipment assembly is substantially flat, without any protruding element, as in the prior art, thereby avoiding breakages and increasing the service life of the assembly. This is also due to the increased resistance of the filtering slabs with respect to the nozzles used in the state of the art.
  • the modular feature of the filtering equipment of the present invention (constituted by a plurality of frames to cover the filter bottom), allows for the easy transport of individual elements and to adapt the assembly to open filters of any size.
  • the filtering equipment comprises, as main elements, a plurality of support legs 10, a plurality of frames 20 and a plurality of filtering assemblies.
  • a support leg 10 is shown according to the invention.
  • Said support leg 10 presents a rectangular prismatic body, this body comprising on one end a pair of projections 12 and flexible lugs 14 to provide a pressure coupling and a clip attachment, respectively, with a frame 20 disposed on said support leg 10, as explained below herein. Therefore, it is understood that the object of said support legs 10 is to keep the frames 20 raised above the filter bottom, thereby creating a double bottom therein where the filtered water circulates.
  • a frame 20 can be seen according to the preferred embodiment of the invention.
  • the frame 20 presents a square form, and defines four openings 22 therein.
  • edges of the openings are arranged on a plane slightly below the level of the upper plane side of the frame, so that once arranged the filter assemblies onto the edges of the corresponding openings 22, the upper surface of the filtering equipment of the invention is substantially coplanar.
  • the frame 20 further presents a plurality of housings 26 which project downward, each of which arranged for housing a leg 10 of the type described above with reference to Figure 1 .
  • two adjacent sides of the frame 20 have a pair of protuberances 28a, each in the form of a T, while the opposite sides have a pair of recesses 28b, each, also in the form of a T.
  • protuberances 28a and recesses 28b allow therefore the coupling between two adjacent frames 20, introducing the protuberances 28a of a frame 20 in the recesses 28b of the adjacent frame 20. This enables the coupling of any number of frames 20 required to completely cover the bottom of a given open filter, providing thus the aforementioned double bottom required for filtering in any filter material.
  • each filtering assembly is actually constituted by a filtering slab 30 and a skirt body 40 with a closed cross section.
  • each filtering plate 30 comprises a flat upper surface and its thickness is selected so that, when attaching the slabs 30 onto the frames 20 to cover their openings 22, said flat surface remains coplanar with the upper side of the corresponding frame, so that the upper surface of the filtering equipment assembly is substantially flat without any element protruding vertically from the false bottom formed.
  • the filtering slab 30 comprises a filtering grid 32 wherethrough the water is separated from the filter bed by filtering. Furthermore, the filter slab 30 comprises on its lower surface four flexible lugs 34 which are attached in the above herein described grooves 24 of a frame 20. As a person skilled in the art can easily understand, said flexible lugs 34, thanks to their inclined section at the end, deform slightly toward each other when inserted into the grooves 24. Once introduced into the grooves 24, they recover their original form and, thanks to the provided step at the end of the inclined section, the accidental removal of the lugs 34 from the grooves 24 is prevented. Thus a clip attachment is provided between the slab 30 (and therefore the filtering assembly) and the corresponding frame 20, covering the opening 22 of the frame 20 by the slab 30, provided with the filtering grid 32.
  • the slab 30 comprises a plurality of projections 36 also on its lower side (specifically in this case eight projections 36). Said projections 36 have the function of providing an attachment by pressure coupling with the skirt body 40, as described below herein.
  • skirt body 40 according to the preferred embodiment of the present invention.
  • Said skirt body 40 comprises at least a vertical wall 42 which, in this preferred embodiment of the invention amounts to a total of four walls which, once coupled the skirt body 40 to de slab 30, extends from the periphery of the filtering grid 32 downward, i.e., t the false bottom of the open filter.
  • said skirt body 40 further comprises a peripheral flat edge perpendicular to said vertical walls 42, wherein a plurality of holes 44 (eight, in this case) is disposed corresponding to the projections 36 of the slab 30. These holes 44 have the function of receiving the above described projections 36 of the slab 30 providing thus the attachment by pressure coupling between the filtering slab 30 and the skirt body 40.
  • the skirt body 40 remains suspended by the slab 30 elevated from the filter bottom.
  • the skirt body 40 also comprises four ventilation openings 46 (in this case, circular); specifically a ventilation opening 46 in each of the four vertical walls 42.
  • air is usually introduced into the filter assembly from the bottom, (i.e., from the gap formed between the filter bottom and the upper surface of the filtering equipment), so that it reaches the lower side of the filtering grid 32 through the skirt body 40.
  • the introduced air is used to clean the filter bed 32, throwing the filter bed and other particles upwards that, retained by the filter bed, have been deposited on the slabs.
  • the ventilation openings 46 communicate the air introduced in this cleaning phase, thus allowing the creation of an air chamber immediately below the frames 20 and the filtration slabs 30, so that the pressure exerted by the air on the filtering grids 32 stabilises and the passing of the air through all the filtering grids 32 becomes uniform, and therefore improving the cleaning of the filtering equipment as a whole.
  • the filtering slab and the skirt body are provided as a single piece, called filtering assembly, for example connecting both elements by welding or directly manufacturing them directly in a single piece through injection moulding or any other technique widely known and used by the people skilled in the art.
  • coupling means are provided between the various elements of the filtering equipment described in the present invention (support leg and frame, filtering assembly and frame, etc.) different from the clip attachments previously described herein, such as any means of mechanical coupling known by the people skilled in the art (male-female coupling, pressure attachment, screws, bolts, etc.)
  • the various elements mainly present square forms (frames, openings, filtering slabs, skirt bodies, etc.), it is clear that these elements may present any other suitable form (polygonal, circular, cylindrical, etc.), without therefore deviating from the present invention.
  • the form defined by the periphery of the frames is preferably polygonal (square, pentagonal, hexagonal,%), and not circular, in order to enable the coupling between a plurality of frames covering the whole bottom of an open filter.
  • the height and passage cross section of these ventilation openings do present preferred values which obtain the expected advantageous technical effect. They constitute therefore important facts for the proper functioning of these openings, so that they perform as expected. Therefore, to vary the size, section, or height of the holes can result in their malfunction, which may be caused by a difficulty of air passage or blockages of the holes that can be covered with water in the event that their height is too reduced, in which case, they do not perform the function for which they have been created.
  • the closed cross section of the skirt body which in this preferred embodiment of the invention comprises a square cross section, but it is also possible that it comprises a circular cross section, for instance.
  • the skirt body with a circular cross section despite the fact of only presenting a vertical cylindrical wall, will comprise at least four ventilation openings, located equidistantly therein.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filtration Of Liquid (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Biological Treatment Of Waste Water (AREA)
  • Hydroponics (AREA)

Claims (12)

  1. Équipement de filtration ouvert pour une station de traitement des eaux, pour filtres ouverts avec lits de filtration, comme du sable, du charbon, etc., ledit équipement de filtration comprenant :
    - une pluralité de châssis (20), chacun présentant au moins une ouverture (22), ladite pluralité de châssis (20) étant appropriée pour couvrir le fond d'un filtre ;
    - une pluralité d'ensembles de filtration (30, 40) avec une surface supérieure plate, chacun pouvant être fixé à un châssis (20) couvrant une ouverture (22) de ce dernier, chaque ensemble de filtration (30, 40) présentant une grille de filtration (32) pour séparer l'eau du lit de filtration par filtration ; et
    - une pluralité de montants de support (10) dans lesquels les châssis (20) sont supportés ;
    caractérisé en ce que les ouvertures (22) des châssis (20) sont prévues au niveau de leurs bords de surfaces de support respectives pour les ensembles de filtration (30, 40), ces surfaces de support étant agencées à un niveau au-dessous de la face supérieure desdits châssis (20), et en ce que les ensembles de filtration (30, 40) et la surface supérieure des châssis (20) sont conçus de sorte que la surface supérieure plate des ensembles de filtration (30, 40) est coplanaire avec la surface supérieure des châssis (20) quand lesdits ensembles de filtration (30, 40) sont couplés sur un châssis correspondant ;
    et dans lequel les montants de support (10) comprennent un corps prismatique rectangulaire, ce corps comprenant sur une extrémité un couple de parties en saillie (12) et des oreilles souples (14) pour fournir respectivement un accouplement par pression et un attachement par agrafe, avec un châssis (20).
  2. Équipement de filtration ouvert selon la revendication 1, caractérisé en ce que chaque ensemble de filtration (30, 40) comprend en outre un corps de jupe avec une section transversale fermée formée par au moins une paroi verticale (42) qui s'étend à partir de la périphérie de la grille de filtration (32) orientant, dans une position d'assemblage correcte de l'équipement de filtration, vers le fond de filtre, présentant ladite au moins une paroi verticale (42) du corps de jupe au moins une ouverture de ventilation (46) pour communiquer l'air introduit dans une phase de nettoyage de filtre.
  3. Équipement de filtration ouvert selon la revendication 2, caractérisé en ce que, lorsque la section transversale de la jupe de corps est tubulaire, la paroi verticale cylindrique unique qui la forme comprend au moins quatre ouvertures de ventilation situées de façon équidistante (46).
  4. Équipement de filtration ouvert selon l'une quelconque des revendications 2 et 3, caractérisé en ce que chaque ensemble de filtration (30, 40) consiste en un bloc filtre supérieur sensiblement plat (30) et un corps de jupe (40) indépendants l'un de l'autre, comprenant en outre un moyen d'attachement entre ledit bloc filtre (30) et ledit corps de jupe (40).
  5. Équipement de filtration ouvert selon la revendication 4, caractérisé en ce que ledit moyen d'attachement consiste en parties en saillie (36) agencées sur une surface inférieure du bloc filtre (30) sur la périphérie de ladite grille de filtration (32) et en trous (44) agencés sur une surface supérieure dudit corps de jupe (40) approprié pour loger lesdites parties en saillie (36) et effectuer l'accouplement par pression entre le bloc filtre (30) et le corps de jupe (40) .
  6. Équipement de filtration ouvert selon l'une quelconque des revendications précédentes, caractérisé en ce que chaque ensemble de filtration (30, 40) est couplé sur un châssis (20) par des attachements par agrafe.
  7. Équipement de filtration ouvert selon l'une quelconque des revendications 1 à 5, caractérisé en ce que chaque châssis (20) est attaché constituant une pièce unique avec les ensembles de filtration (30, 40) qui couvrent chacune de ses ouvertures (22).
  8. Équipement de filtration ouvert selon l'une quelconque des revendications précédentes, caractérisé en ce que les châssis (20) ont une forme carrée et comprennent, sur deux de leurs côtés, des protubérances (28a) d'une forme déterminée, et sur les deux autres côtés, deux parties en retrait (28b) de manière correspondante auxdites protubérances (28a), lesdites parties en retrait (28b) et protubérances (28a) permettant l'accouplement entre deux châssis (20) par l'introduction des protubérances (28a) d'un châssis (20) dans les parties en retrait (28b) d'un autre châssis adjacent (20).
  9. Équipement de filtration ouvert selon l'une quelconque des revendications précédentes, caractérisé en ce que chaque châssis (20) comprend quatre ouvertures (22) agencées chacune pour être couvertes par un ensemble de filtration (30, 40).
  10. Équipement de filtration ouvert selon la revendication 9, caractérisé en ce que chaque châssis (20) comprend en outre quatre rainures (24) situées dans la périphérie de chaque ouverture (22) pour fournir un attachement par agrafe avec un ensemble de filtration (30, 40).
  11. Équipement de filtration ouvert selon les revendications 4 et 10, caractérisé en ce que le bloc filtre (30) comprend sur sa surface inférieure quatre oreilles souples (34) qui sont attachées dans les rainures (24) du châssis (20).
  12. Équipement de filtration ouvert selon la revendication 1, caractérisé en ce que chaque châssis (20) comprend en outre une pluralité de logements (26) qui dépassent vers le bas, chacun d'eux étant agencé pour loger un montant de support (10).
EP14783501.1A 2013-04-10 2014-04-01 Équipement de filtration à système ouvert pour station de traitement des eaux Active EP2985064B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ES201330510A ES2521790B1 (es) 2013-04-10 2013-04-10 Equipo de filtración en abierto para estación de tratamiento de agua
PCT/ES2014/070249 WO2014167152A1 (fr) 2013-04-10 2014-04-01 Équipement de filtration à système ouvert pour station de traitement des eaux

Publications (3)

Publication Number Publication Date
EP2985064A1 EP2985064A1 (fr) 2016-02-17
EP2985064A4 EP2985064A4 (fr) 2017-02-15
EP2985064B1 true EP2985064B1 (fr) 2019-07-17

Family

ID=51688980

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14783501.1A Active EP2985064B1 (fr) 2013-04-10 2014-04-01 Équipement de filtration à système ouvert pour station de traitement des eaux

Country Status (6)

Country Link
US (1) US10183241B2 (fr)
EP (1) EP2985064B1 (fr)
BR (1) BR112015025927B1 (fr)
CL (1) CL2015003027A1 (fr)
ES (2) ES2521790B1 (fr)
WO (1) WO2014167152A1 (fr)

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3762559A (en) 1972-07-17 1973-10-02 Rostone Corp Filter bottom and molded module therefor
US4579659A (en) * 1983-11-03 1986-04-01 Indreco U.S.A., Ltd. Filter nozzle
US4619765A (en) * 1984-10-10 1986-10-28 Roberts Filter Manufacturing Company Filter bottom construction
LU85672A1 (de) 1984-12-06 1986-07-17 Arbed Filterbett
US6615469B1 (en) 1999-11-09 2003-09-09 All Service Contracting Corporation Method for retrofitting an underdrain
US8052871B2 (en) 2001-09-10 2011-11-08 Rg Delaware, Inc. Underdrain system
ES1060660Y (es) 2005-06-24 2006-02-01 Fundacion Canaria Ct Canario D Tarima modular filtrante para la aplicacion en unidades de filtracion de flujo ascendente o descendente
WO2007003383A1 (fr) * 2005-07-06 2007-01-11 Unilever N.V. Filtre et procede de filtrage de liquides
ES1064181Y (es) 2006-09-05 2007-05-16 Fundacion Canaria Ct Canario D Modulo de caja micro-perforada para la aplicacion en unidades de filtracion de flujo ascendente y descendente
US8668092B2 (en) 2006-10-27 2014-03-11 Roberts Marketing De, Inc. System and method for uniformly distributing a fluid through a filter bed in a filter
US8048186B2 (en) 2009-04-02 2011-11-01 General Electric Company Filter retention systems and devices

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
ES2521790A1 (es) 2014-11-13
WO2014167152A1 (fr) 2014-10-16
ES2521790B1 (es) 2015-09-09
BR112015025927B1 (pt) 2021-11-09
US20160067633A1 (en) 2016-03-10
EP2985064A1 (fr) 2016-02-17
ES2749129T3 (es) 2020-03-19
BR112015025927A2 (pt) 2017-07-25
CL2015003027A1 (es) 2016-07-08
US10183241B2 (en) 2019-01-22
EP2985064A4 (fr) 2017-02-15

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